Friday in photos

Victoria Azarenka of Belarus prepares to serve to Li Na of China during their tennis match at the WTA Championship in Istanbul, Turkey, Friday, Oct. 25, 2013. The world's top female tennis players compete in the championships which runs from Oct. 22 until Oct. 27.(AP Photo)Photo by Turkey Tennis WTA Championship

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Amanda Knox and her family celebrate acquittalItaly's highest court overturned the murder conviction against Amanda Knox and her ex-boyfriend Friday over the 2007 slaying of Knox's roommate, bringing to a definitive end to the high-profile case.